The laboratory developed tortilla contains probiotics -- live microorganisms found in yogurt and other fermented foods
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Food scientist Raquel Gomez flips a tortilla that can be kept for weeks outside a refrigerator at a university laboratory in Mexico
Refrigerators are still a luxury for some Mexicans, such as these members of the Tzeltal Indigenous community who smoke meat to preserve it instead
The tortilla is a Mexican staple, consumed in tacos and other dishes by millions every day
Peering through a microscope, food scientist Raquel Gomez studies microorganisms that add nutrients and preserve tortillas for several weeks w…